首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle
admin
2013-01-10
67
问题
The library of congress in Washington, D.C. which 【C1】______ the largest collection of books in the world, is fighting a battle against paper deterioration. The 【C2】______ of the old books, often yellowed and torn, 【C3】______ crumble when they are touched. The main culprit in the battle is the acidic paper tt3at has 【C4】______ making books since the nineteenth century.
Air pollution and moisture 【C5】______ the problem. 【C6】______ the books that are most 【C7】______ destruction are not the oldest books. The paper in books produced 【C8】______ the last century was made 【C9】______ cotton and linen rags, 【C10】______ are naturally low in acid. And the Gutenberg bible, 【C11】______ five centuries ago, was made of thin calfskin, and is in 【C12】______ good shape. But in the nineteenth century, with widespread literacy bringing a demand for a cheaper and more plentiful 【C13】______ of paper, the industry began using 【C14】______ treated wood pulp for making paper. 【C15】______ the chemical in these paper that is causing today’s problem. This problem of paper deterioration is one of 【C16】______ concern. France, Canada, and Austria are all doing research into the new methods of deacidification. A new technology has been 【C17】______ recently, in fact, that allows for mass deacidification of 【C18】______ books at the same time. It costs less than microfilming and 【C19】______ preserves books in their original form. 【C20】______ there will soon be treatment facilities all over the world to preserve and deacidify library book collections.
【C4】
选项
A、been used to
B、used to
C、been used for
D、used for
答案
C
解析
根据上下文,此处应用use被动语态的完成时。因此正确答案是C。
转载请注明原文地址:https://kaotiyun.com/show/zChK777K
0
专业英语四级
相关试题推荐
WhatweretheofficialinterestratesbeforetheReserveBankofAustraliaannouncedacut?
Theincreaseinstudentnumbers______manyproblemsfortheuniversities.
Whyistheworld’slargestdrugcompanyembroiledinaglobalcontroversy?
ThenoticeabouttheEnglishevening______manystudentswhohaveinterestinEnglish.
Therearenotmanyteacherswhoarestrong______oftraditionalmethodsinEnglishteaching.
Oneoftheadvantagesofmostpaidworkisthatitgiveschancesofsuccessandopportunitiesforambition.Inmostworksuccess
Aconventionalteacher’slicenseusuallyrequiresauniversitydegreeineducationplusanunpaidtermofpracticeteaching.Thi
Bythe1980s,accordingtointernationalbutadmittedlyinconsistentdefinitionsofliteracy,aboutsevenoutoftenadultsinth
Don’tbe_____byproductsclaimingtohelpyouloseweightinaweek.
Culturalnormssocompletelysurroundpeople,sopermeatethoughtandactionthatweneverrecognizetheassumptionsonwhichth
随机试题
成分离心机离心温度的检测方法是把经计量部门标定的温差电偶温度计的探头放入离心室内,盖好离心机盖。观察离心机温度显示的温度与温差电偶温度计显示温度的差值。观察时间是盖好离心机盖后
A.白术散B.防己黄芪汤C.生脉散D.真武汤E.猪苓汤妊娠合并慢性肾炎肾阳虚证治疗方剂为()
依据《建设项目竣工环境保护验收管理办法》,核设施建设项目试运行前,建设单位应向环境行政主管部门报批(),经批准后,方可进行试运行。
由不同功能的计划构成的进度计划系统包括()
以下哪项不是会计人员的主要职责?()
某市一居民企业为增值税一般纳税人,主要生产销售同一型号的空调。2015年1~11月实现销售收入7000万元,与收入相配比的销售成本4200万元(成本占销售收入的比例为60%),缴纳增值税450万元、城市维护建设税和教育费附加45万元,取得国债利息收入50万
关于贷款的风险分类,下列说法正确的是()。
新转来的学生小明常常以叛逆者自居,他学习成绩不好,经常在上课时表现出怪异行为,比如:学狼叫,席地而坐,甚至在众目睽睽之下从讲台爬回自己的座位上。所有的任课老师都说小明是个十足的坏孩子,品行不端。作为班主任的李老师并没有放弃小明。她暗地调查,并根据小明的具体
关于(SNMP)简单网络管理协议的说法中,错误的是______。
Whatistheletterfor?Toapply______.Whatdoeshedoinhisfreetime?Hemends______forhisrelativesandfriendsinh
最新回复
(
0
)